Crinkled coated surface



- Patented Feb. 19, 1935 r 1,991,527

UNITED STATES PATENT OFFICE CRINKLED COATED SURFACE Karel Toll, Passaic, N. J., assignor, by mesne assignments, to Chadeloid Chemical Company, New York, N. Y., a corporation of West Virginia No Drawing. Application November 17, 1931, Serial No. 575,644

1 Claim. (Cl. 9170) This invention relates to crinkled coated surspaced, ridges is obtained when the crinkle-formfaces, and more particularly to a method of varying temperature is relatively low, while a light ing the character of the crinkling. crinkle of fine, closely spaced ridges, results when Crinkled "surfaces may be produced on fabric, the crinkle-forming temperatureisrelatively high.

5 wood, metal, paper and similar semi-porous or Between the two extremes of heavy crinkle and 5 non-porous materials by applying thereto a mixlight crinkle, a variety of intermediate degrees of ture of suitably treated oils. The coating has a crinkling may be produced by varying the crinklesmooth paint-like surface when first applied, and forming temperature accordingly. transforms upon drying into a crinkled but un- This rule of operation is generally applicable broken surface of fairly definite design. The to controlling the character of the crinkling in 10 drying of the surface coating may be expedited by crinkled coated surfaces with respect to the siz I the application of heat. and spacing of the ridges.

The coating mixture usually consists of a mix- The following examples illustrate the results ture of separately and differently heat treated oils, obtainable with myinvention:

as for example, China wood oil and soya bean oil, A coating mixture was prepared by subjecting 15 together with fillers and coloring pigments as separate portions of China wood oil to heat treatdesired. Due to the difference in the treatment ment under differing conditions of temperature and also to thediflerence in the character of the and time of treatment. After the treatment the several constituent oils, part of the coating dries separate portions were combined and mixed with more rapidly than the remainder and causes the fillers and coloring pigments in the usual manner. 20 formation of spaced ridges in the surface thereof. Portions of the coating mixture thus prepared The character or appearance of the surface varies were then applied to a semi-porous fabric of the according to the size and spacing of the ridges. oilcloth type under theffollowing conditions:

Thus when the ridges are quite heavy and spaced After'coating the first portion of the mixture apart, the effect obtained is that of a heavy or upon the fabric, the material was subjected to a 25 accentuated crinkle, while the formation of fine, crinkle-forming temperature of 110 F. for apclosely spaced ridges produces a light crinkle and proximately one-half hour. At the end of the gives the surface a less corrugated appearance. half-hour period, the coating, which was smooth I have discovered that the size and spacing of the when first applied, had transformed into a ridges and consequently the character of the crinkled surface having heavy, widely spaced, crinkled surface is influenced by the temperaridges' The temperature was then raised to about ture to which the material is subjected immedi- 200 F. and maintained at that value for about six ately after the application of the coating. hours, in which time the surface coating was dried The complete drying of the coating requires completely and the crinkle was of the heavy, ac-

a measurable period of time, even when the drycentuated type. 35 ing is effected at elevated temperatures. Accord- A second portion of the coating mixture was ing to my discovery, the drying period may be diapplied to a piece of fabric similar to that coated vided into two stages. In the first stage, which in the first operation under substantially the is of relatively short duration, the spaced ridges, same conditions as regards thickness of coating,

40 constituting the crinkled surface, are formed, and rate of application, and the like. After the ap- 40 in the second stage the entire coating is dried plication of the coating in this operation, the throughout and the crinkle is permanently set. material was subjected to a crinkle-forming tem- The first stage may be designated as the crinkleperature of 180 ,F. for a period of approximateforming stage, and the temperature to which the ly twenty minutes, at .the end of which period material is subjected during this stage as the a large number of fine, closely spaced, ridges 45 crinkle-forming temperature. The second stage formed'throughout the surface area. The temv is the final drying stage and the temperature perature was then raised to a final drying temduring this stage is the final drying temperature. perature of about 200 F. as before, and in" about The present invention then consists in regusix hours the surface coating had dried comlating the character of thecrinkled surface by pletely with a lightly corrugated surface ap- 50 regulating the crinkle-forming temperature, the pearance. size and spacing of theridges which constitute It is to be understood that the specific data the crinkled surface varying in inverse relation to presented in the preceding examples is not to the crinkle-forming temperature. Thus, a heavy be considered a limitation of the invention.

7 or accentuated crinkle consisting of heavy, widely Thus the temperature to which the material is subjected during the final drying stage may be maintained at any desired value, although temperatures high enough to afiect deleteriously either the fabric (or other material being coated) or the coating composition, naturally are to be avoided. The invention relates to selecting the crinkle-forming temperature to produce the desired crinkle, and thereafter completing the drying at a suitable temperature, usually higher in order to shorten the drying operation.

I claim:

In a process of producing crinkled coated surfaces, the steps of applying a crinkle coating composition to an article of manufacture, and

heat treating said coating in successive heating stages of increased temperatures by heating said coating at a temperature of not less than 110 F. for a relatively short period of time to form the crinkles and to control the character thereof, .and then heating the coating in a distinct heating stage at a temp'eraturevof about 200 F. to set the crinkles formed in the first heating stage and to dry the coating substano tially completely.

' KAREL TOLL. 

